Solidification matrix comprising phosphinosuccinic acid derivatives

• US 9,255,242 B2
• Filed: 04/21/2014
• Issued: 02/09/2016
• Est. Priority Date: 09/13/2012
• Status: Active Grant

• Current Assignee: Ecolab USA Incorporated (Ecolab, Inc.)
• Original Assignee: Ecolab USA Incorporated (Ecolab, Inc.)
• Inventors: Olson, Erik C., Silvernail, Carter M.
• Primary Examiner(s): Douyon, Lorna M
• Application Number:
  US14/257,527
• Publication Number:
  US 20140228275A1
• Time in Patent Office: 659 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: C11D 17/0047 Detergents in the form of bars or tablets
• CPC Class Codes: C11D 3/10 Carbonates ; Bicarbonates
• CPC Class Codes: C11D 3/365 containing carboxyl groups

Abstract

Stability enhancement agents for use in a solidification matrices and solid detergent compositions are described. Stability enhancement is provided by a hydratable salt, water and phosphinosuccinic acid (PSO) derivative binding agents forming a dimensionally stable composition. Preferred phosphinosuccinic acid (PSO) derivatives include phosphinosuccinic acid and mono-, bis- and oligomeric phosphinosuccinic acid (PSO) derivatives. The stability enhancement composition for use in a solid detergent and solid detergent compositions are preferably biodegradable and substantially free of phosphate and NTA-free.

Claims

1. A solid detergent composition comprising:

a phosphinosuccinic acid derivative;

a surfactant;

a hydratable salt comprising sodium carbonate; and

water;

wherein the composition has less than about 2 wt-% phosphate, and

wherein the solid detergent provides a use solution having a pH between about 9 and 12.5.

2. The composition of claim 1, wherein the phosphinosuccinic acid derivative comprising phosphinosuccinic acid and mono-, bis- and oligomeric phosphinosuccinic acid adducts comprises at least 10 mol % of an adduct comprising a ratio of succinic acid to phosphorus from about 1:

1 to 20;

1.

3. The composition of claim 1, wherein the phosphinosuccinic acid (I) and mono- (II), bis- (III) and oligomeric (IV) phosphinosuccinic acid adducts have the following formulas:

4. The composition of claim 1, wherein the surfactant comprises a nonionic surfactant.

5. The composition of claim 4, wherein the nonionic surfactant comprises ethylene oxide, propylene oxide, or a combination of ethylene and propylene oxide.

6. The composition of claim 1, wherein the solid detergent composition is dimensionally stable and has a growth exponent of less than 3% if heated at a temperature of 122°

F.

7. The composition of claim 1, wherein phosphinosuccinic acid derivative constitutes between about 0.1 wt-% and about 20 wt-% of the composition, and wherein the hydratable salt constitutes between about 40 wt-% and about 90 wt-% of the composition.

8. The composition of claim 1, further comprising at least one functional ingredient selected from the group consisting of an alkalinity source, detergent builder, and combinations thereof, and wherein a use solution comprises from about 100-1500 ppm of an alkalinity source, and from about 5-500 ppm phosphinosuccinic acid derivative.

9. The composition of claim 1 wherein the composition is a cast, pressed, or extruded solid.

10. The composition of claim 1 wherein the solid detergent composition comprises between about 0.1 wt-% and about 20 wt-% a phosphinosuccinic acid derivative, between about 0.1 wt-% and about 50 wt-% water, between about 0.5 wt-% and about 10 wt-% surfactant, and between about 40 wt-% and about 90 wt-% hydratable salt, wherein the solid detergent composition has less than 1 wt-% phosphate, and wherein the solid detergent composition is dimensionally stable and has a growth exponent of less than 3% if heated at a temperature of 122°

F.

11. The composition of claim 10, wherein the phosphinosuccinic acid (I) and mono- (II), bis- (III) and oligomeric (IV) phosphinosuccinic acid adducts have the following formulas:

12. The composition of claim 10, wherein the phosphinosuccinic acid derivative comprises at least 10 mol % of an adduct comprising a ratio of succinic acid to phosphorus from about 1:

1 to 20;

1.

13. The composition of claim 1, further comprising at least one functional ingredient selected from the group consisting of:

chelating agents, sequestering agents, inorganic detergents, organic detergents, alkaline sources, water conditioners, rinse aids, hardening agents, bleaching agents, sanitizers, activators, detergent builders, fillers, defoaming agents, anti-redeposition agents, optical brighteners, dyes, odorants, stabilizing agents, dispersants, enzymes, corrosion inhibitors, thickeners and solubility modifiers.

14. The composition of claim 1, wherein the composition is substantially phosphate-free and NTA-free.

15. The composition of claim 10, wherein the solid detergent composition is dimensionally stable and has a growth exponent of less than 3% if heated at a temperature of 122 F.

16. A method of forming a solid detergent composition according to claim 1, comprising:

combining the hydratable salt comprising sodium carbonate and the surfactant to form a powder pre-mix; and

mixing the powder pre-mix with a liquid pre-mix, the liquid pre-mix comprising the phosphinosuccinic acid derivative and water,

and wherein the detergent composition is effective for preventing the formation, precipitation and/or deposition of hard water scale on a treated surface.

17. The method of claim 16, wherein the hydratable salt is between about 40 wt-% and about 90 wt-% of the solid detergent composition.

18. The method of claim 16, wherein the detergent composition is a cast, pressed, or extruded solid.

19. The method of claim 16, wherein the combining step further comprises added to the powder premix at least one functional component selected from the group consisting of:

chelating agents, sequestering agents, inorganic detergents, organic detergents, alkaline sources, builders, water conditioners, rinse aids, hardening agents, bleaching agents, sanitizers, activators, fillers, defoaming agents, anti-redeposition agents, optical brighteners, dyes, odorants, stabilizing agents, dispersants, enzymes, corrosion inhibitors, thickeners and solubility modifiers.